Speaker box with amplifier



FIG. 1 is a perspective view of the front, top and right side of a speaker box with amplifier showing my new design;

FIG. 2 is a front view of thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view in usage.

The portions shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a speaker box with amplifier, as shown and described. 